Draft-controlled detent.



J. J. WENDEL & H. W. BALSLEY.

DRAFT CONTROLLED DETENT.

APPLICATION FILED NOV. 16, 1914.

Patented Dec. 3, 1918.

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JOHN .1. WENDEL AND HARBYW. BALSLEY, or SYRACUSE, NEW YORK.

DRAFT-CONTROLLED DETENT.

Specification of Letters Patent.

. Patented Dec. s, 1918.

Application filed November 16, 1914. eria1 N 0; 872,406.

To all whom it may concern:

Be it known that we, JOHN J. WENDEL and HARRY W. BALSLEY, citizens of the United States, and residents of Syracuse,

in the county of Onondaga, in the State of clear, and exact description.

. This invention relates to certain improvements in draft controlled detents as applied more particularly to the automatic regulation of draft and check .dampersof heaters andto the operation of electric switches and other'time controlled apparatus. j

r The main object is to provide simple and comparatively inexpensive means adapted to be set by the operatorto automatically trip the detent at any time within a period of twelve hours from the time of setting for opening a draft damper, closing 'a check damper, or simultaneously opening one damper and closing the other, or for operating an electric switch to open orclose an "electric lighting or other circuit at a predetermined time.

In other words, we have sought'to provide chronometer controlled means for causing thedraft ofa heater to be opened 'at any predetermined time, as for example,iin the morning after the device has'been set the night'before, or'it'may be used to automatically turn out the lights" of an electric circuit at any predetermined time, as" for example, at mid-night or at the dawn of day, without further attention from the operator after being set anytime during the previous twelve hours. Y

- Other objects and uses relating to specific parts of the device will be brought out'in the following descri tion. In the drawings Figure -1' s a perspectlve view of a heater showing a draft damper and check damper draft and check dampers ca and a/ of a hot-air, steam, or hot water. heater A, or an electric switch b of a light ing or heat circuit B, and preferably comprises a clock driven actuator -1 a detent 2 and suitable means for transmitting motion from the actuator to the detent for tripping the latter at a predetermined time. g

As shown in Figs. 1 and 2, the actuator 1 consists of a gear or pinion secured to the rear end of an alarm operating spindle c of an ordinary alarm clock C, and meshing with a sliding toothed rack 3 which is guided in suitable ways 4 on the'back of a clock supporting frame 5, so that when the alarm spindle 0 isset 'in the usual manner to be released at a'predetermined time, the toothed rack 3 will be shifted or set to its normal supporting position, and upon the automatic release of the alarm spindle c in'the manner well known for alarm clocks, the pinion or actuator -1 will be rotated in the direction indicated by the arrow X, Fig. 2 to shift the bar 3 to the position shown by dotted lines Fig. 2, the bar being limited in its forward and backward movement by stops 6- thereon engaging with the inner faces of the guide-ways 4:

A lever 7, of the first kind, is fillcrumed at 8-' upon the clock-supporting frame 5. with its upper end'in engagement with the front end of the toothed rack '3' and its lower end connected by a link 9 to the detent 2, so that when the spindle c isreleased ata predetermined time'to which it has been previously set, the bar 3 will be driven forwardly by the rotation of the pinion 1-, thereby operating the lever -7 and link 9 to withwith the damper operating lever 10' This detent '2 preferably consists of at sliding bolt guided inra suitable frame 11' and normally spring-pressed to its draw the detent from holding'engagement holding position by a coil spring12-, but

'is adapted to be withdrawn from such position, or tripped,by theoperation of the lever 7-.- from itsnormal position to the position shown by dotted lines in Fig; 2. The

lever 10J is fulcrumed intermediate its ends at 14 upon an extension 13 of weight -15 held in place byset screw 16 the opposite end being provided set}, portion with a series of apertures 17 for per mitting the attachment of suitable damper operating cables 18 and 19-, the cable l8- being directly connected to the draft door a, while the cable -19 is passed" around suitable sheavesand connected to the check damper :a p

a The damper. operating lever -10 is set -by.hand to bring the end thereof which is '10 connected to the cables V18 and 19'.

directly under the detent 2,the latter serving-to hold the lever p10 in this po cooperateslwith asuitable lever +7fto .trip the detent throughthe medium of cable 9', having one end connected-t0 said lever and itszother end passed around a sheave 8 and connected to the detent The lever 7 is preferably provided witha downwardly offset end .20"- resting upon the perimeter. of the cam l:-, which is'of sufiicient throwthat when released and rrot-ated'by the clock mechanism in the di- "rection indicated Vby'thearrow X, will "elevate the free'en'd of the lever 7 and 7 thereby drawfthe cable '9'- in the same --,direction to withdraw the detent 2 from holding engagement with the damper. operatingle'ver 10, which will'then vbe ::actuatedbyits weight --1 5 to open the dra'ft damper a and close the check ;-.damper"af, the highest point of the cam being provided With a shoulder -21- adapted to engage the lower end of'the' oil? 20 of the lever "7' ;to

limit, the degree of rotation'of the actuator I*1. after the draft damper has been openedand.thecheckdamper closed;

- This draft controllingdevice is preferably located-near thefurnace, soathattheattench 'ant, after fixing the furnace for the night with the draft damper closed and thejcheck ,damper'o'pen', may set the device tom'aintain thedampers in this position until a prede-' 5 termined time inthe morning, at which time thedetent 2- will be tripped to release the lever -10{ and allowth weight '+-15i to; operate the same for-opening the" draft l 1 door and closing the check damper,,it'being;

- 6 undertoodthat the .draftdoorcldses by its own-gravity when the cable 19 is slackenedeb the upward movement of the end of the lever whichit-is attached; 'a

for example, assuming that an ordinary "clock and having. one'end located in the path alarm clock isprovided with the usual alarm spindle 0 to which the pinion 1 has been secured and that the attendant, after fixing the furnace for the night, wishes to have thexdraft opened at 5 oclock the next morning, It is then simply necessary to set the usual alarm index finger to the hour graduation 5 on its vcorresponding dial and to then wind the alarm spindle in the direction opposite that indicated by the arrow X, which, of course, will with draw the bar. and allow the spring .12 of the detent +2- tofreturn the link -9 and lever Z' tothe position 7 shown by full 7' lines in Fig. 2, and at the same time, forcing the detent to. its holding position, whereupon the damper operating lever f10*' is adjusted by hand into hold- 'in'g engagement with said 'detent against the action of the weight -15 r :Now, as the clock continues" to act in the usual manner, the spindle 'c.'' and pinion 1 thereonwill be released at exactly 5 'oclock in the morning ,to operate the bar- '-3 and lever 7-- for thepurpose ofawithdrawing the detent 2+ and releasfin'g the damper operating lever 1O., whichin turn is operated by the-weight :fl'15v to open the draft damper a and close the check 'idampe'r ''a'' through thea medium .of their respective cables f18'; and 119 this operation of settingthedevice and its automatic releaseof theTdete'nt for the damper operating mechanism being repeated each night.;. ,l 7 I What we claim is: Y r V V A] draft controlled: detentji'ncluding the "combination withan alarm clock having a rotatable winding stem for the alarm inecha-V nism, of a gear secured on" said winding "stem, a pair of alined spaced lugs formed withgroovesysaid' lugs being located above and in spaced relation to said gear, a rack bar longitudinally slidable in the grooves of said-lugs and in constant mesh -with said gear-, saidlugs' and gear preventing the bar T from having any ;vertical "movement with relation to said clock and 'a'lever pivoted intermediate its'ends tothe periphery offsaid of movemen't'of oneend of saidrack barand 'its'freeen'd being connected to a device to r op ne Y a 1 In witness whereof we have hereunto set our hands thisflOth'day of hl ovemberl914. 12 1 JO N J, WENDEIJ.

' ABRV W- BA SLEI; I, Witnesses: 5

-': H. E. CHASE; 3 Anion Cannon;

r i 9 19 thispatentmay be obt'ainedffor fivecents each; by addressihgithe "-eomm issioner of patents, l V A v I ontn ii 7 V i J s 

